How many families were put out by 9/11? About 3000. And you call that an excuse to invade Iraq, Afghanistan, Libya, Somalia, Pakistan etc etc etc. So 3000 American lives, taken by Saudi Arabian citizens, cost the lives of millions across the world so that the American people can feel good about their hegemony?
Al-Qaeda won that war before the US even left their own soil. They had one aim, bring about the end of the USA, and they did it by getting your own government to strip away civil liberties overnight, and you didn't even care.